linux-kernel - Re: [PATCH] ARM: PL011: add support for extended FIFO-size of PL011-r1p5

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Message-ID: <20130419125858.GL14496@n2100.arm.linux.org.uk>
Date:	Fri, 19 Apr 2013 13:58:58 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Jongsung Kim <neidhard.kim@....com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>, jslaby@...e.cz,
	linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: PL011: add support for extended FIFO-size of
	PL011-r1p5

On Fri, Apr 12, 2013 at 06:18:47PM +0900, Jongsung Kim wrote:
> +static unsigned int get_fifosize_arm(unsigned int periphid)
> +{
> +	unsigned int rev = (periphid >> 20) & 0xf;
> +	return rev < 3 ? 16 : 32;

Don't we have a macro to get the revision given the amba device?
amba_rev().
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